HD 30177

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HD 30177
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Dorado
Right ascension 04h 41m 54.3740s[1]
Declination −58° 01′ 14.7247″[1]
Apparent magnitude (V) 8.41
Characteristics
Spectral type G8V
Astrometry
Proper motion (μ) RA: 66.205±0.063[1] mas/yr
Dec.: −11.990±0.083[1] mas/yr
Parallax (π)17.9611 ± 0.0407[1] mas
Distance181.6 ± 0.4 ly
(55.7 ± 0.1 pc)
Absolute magnitude (MV)4.72
Details[2]
Mass1.053±0.023 M☉
Radius1.54±0.03 R☉[3]
1.019±0.034[2] R☉
Luminosity1.04 ± 0.01[3] L☉
Surface gravity (log g)4.417±0.034 cgs
Temperature5,607±47 K
Metallicity [Fe/H]0.39±0.05 dex
Rotation~45 d
Age4.8±1.5 Gyr[3]
2.525±1.954[2] Gyr
Other designations
CD−58°984, HIP 21850, SAO 233633, 2MASS J04415438-5801146[4]
Database references
SIMBADdata

HD 30177 is an 8th magnitude star located approximately 182 light-years (56 parsecs) away in the constellation Dorado. The star is a yellow dwarf, a type of yellow star that fuses hydrogen in its core. Since if this star is a late G-type, it is cooler and less massive than the Sun, but larger in radius. It is 1.8 times older than our Sun. This star system contains two known extrasolar planets.

Planetary system[]

The Anglo-Australian Planet Search team announced the discovery of HD 30177 b, which has a minimum mass 8 times that of Jupiter, on June 13, 2002. The scientific paper describing the discovery was published in The Astrophysical Journal in 2003.[5][6] A second massive gas giant planet was later discovered in an approximately 32 year orbit.[7]

The HD 30177 planetary system[7]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b >8.08±0.10 MJ 3.58±0.01 2524.4±9.8 0.184±0.012 — —
c >7.6±3.1 MJ 9.89±1.04 11613±1837 0.22±0.14 — —

See also[]

References[]

  1. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c Barbato, D.; et al. (August 2018). "Exploring the realm of scaled solar system analogues with HARPS". Astronomy & Astrophysics. 615: 21. arXiv:1804.08329. Bibcode:2018A&A...615A.175B. doi:10.1051/0004-6361/201832791. S2CID 119099721. A175.
  3. ^ a b c Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
  4. ^ "HD 30177". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-08-22.
  5. ^ Tinney, Chris (2007-09-07). "AAPS Discovered Planets". Anglo-Australian Planet Search. University of New South Wales. Retrieved 2018-04-17.
  6. ^ Tinney, C. G.; et al. (2003). "Four New Planets Orbiting Metal-enriched Stars". The Astrophysical Journal. 587 (1): 423–428. arXiv:astro-ph/0207128. Bibcode:2003ApJ...587..423T. doi:10.1086/368068.
  7. ^ a b Wittenmyer, Robert A.; et al. (2017). "The Anglo-Australian Planet Search. XXV. A Candidate Massive Saturn Analog Orbiting HD 30177". The Astronomical Journal. 153 (4). 167. arXiv:1612.02072. Bibcode:2017AJ....153..167W. doi:10.3847/1538-3881/aa5f17.

External links[]

Coordinates: Sky map 04h 41m 54.3731s, −58° 01′ 14.725″

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